646124131054605 has 32 divisors (see below), whose sum is σ = 1181830297745664. Its totient is φ = 295284488242176.

The previous prime is 646124131054601. The next prime is 646124131054607. The reversal of 646124131054605 is 506450131421646.

It is not a de Polignac number, because 646124131054605 - 2² = 646124131054601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646124131054601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 901130524 + ... + 901847253.

It is an arithmetic number, because the mean of its divisors is an integer number (36932196804552).

Almost surely, 2^{646124131054605} is an apocalyptic number.

It is an amenable number.

646124131054605 is a deficient number, since it is larger than the sum of its proper divisors (535706166691059).

646124131054605 is a wasteful number, since it uses less digits than its factorization.

646124131054605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1802981205.

The product of its (nonzero) digits is 2073600, while the sum is 48.

The spelling of 646124131054605 in words is "six hundred forty-six trillion, one hundred twenty-four billion, one hundred thirty-one million, fifty-four thousand, six hundred five".